Changes in Accumulated Other Comprehensive Income Changes in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income before reclassifications	$ (11,536)	$ 17,240	$ (14,849)
Amounts reclassified from accumulated other comprehensive income		8,366	7,975
Reclassification of stranded tax effect		0
OCI before reclassifications, tax expense (benefit)	(2,161)	3,862	(4,330)
Reclassification from AOCI, tax expense (benefit)		(1,094)	(1,484)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	21,282	(3,933)	2,941
Reclassification of stranded tax effect		(391)
Balance, ending	9,746	21,282	(3,933)
Cash Flow Hedging Derivative Activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	0	(7,975)	(15,950)
Other comprehensive income before reclassifications		0	0
Amounts reclassified from accumulated other comprehensive income		8,366	7,975
Reclassification of stranded tax effect		(391)
Balance, ending		0	(7,975)
Cash Flow Hedging Derivative Activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income before reclassifications	0
Balance, ending	0
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning	21,282	4,042	18,891
Other comprehensive income before reclassifications	(11,536)	17,240	(14,849)
Amounts reclassified from accumulated other comprehensive income		0	0
Reclassification of stranded tax effect		0
Balance, ending	$ 9,746	$ 21,282	$ 4,042